memory products - Al Kossow's Bitsavers

ST27C256FN-ST27C256PPROGRAMMING CHARACTERISTICS (Tamb=25±5°C, VCC= 6.0V±0.25V, Vpp= 12.5V±0.3V)DC AND OPERATING CHARACTERISTICSValuesSymbol Parameter Test ConditionsUnitMin. Typ. Max.II Input Current (all inputs) VI 2 VIL or VIHVIL Input Low Level (all inputs) -0.1VIH Input High Level 2.0VOL Output low voltage during verify IOL=2.1 mAVOH Output high voltage during verify IOH= -400 ~ 2.4lee3Vee Supply current(Program & Verify)IpP2 VPP supply current (Program) CE=VIL10 ~0.8 VVee+ 1 V0.45 VV40 mA30 mAAC CHARACTERISTICSSymbol Parameter Test ConditionstAS Address Set-up Time 2toES OE Set-up Time 2tos Data Set-up Time 2tAH Address Hold Time 0tOH Data Hold Time 2tOFP Output enable to output float delay 0tvps VPP set-up time 2tves Vee set-up time 2Min.Valuestpw PGM initial program pulse width 0.95 1.0tOPW(2) CE overprogram pulse width 2.85tOEData valid from OENotes: 1. vcc must be applied simultaneously or before Vpp and removed simultaneously or'alter Vpp.2. topw is de~ined in flow chart.Typ.UnitMax./Ls/Ls/LS/LS/LS130 ns/LS/LS1.05 ms78.75 rns150 nsAC TEST CONDITIONSInput rise and fall times (10% to 90%) s20nsInput pulse levels O.45V to 2.4VInput timing reference level O.BV and 2.0VOutput timing reference level O.BV and 2.0V6110192